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Location:
Sydney
Registered:
May 2002
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Location:
brisbane
Registered:
May 2003
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Re: can a 1J spin up a T77 with a 1.32 back?
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Mon, 20 September 2004 22:46
 
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Ummm, I haven't had experience with this turbo, and I am not proficient enough to run it through engine analyser yet, However A T70 wheel as far as I know isn't suitable for a 1jz...
http://www.moreboost.org/turbos.htm
This site says it's not suitable for the 2jz, due to surge. However with a monstrous 1.32 rear housing, you might find it won't surge but you'd probably find it would take longer to spool. I wouldn't be expecting decent boost by 4000rpm.
It is all speculative however, and you can do all the calcs in the world, only true way to find out is to try it 
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Location:
brisvegas
Registered:
August 2004
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Re: can a 1J spin up a T77 with a 1.32 back?
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Tue, 21 September 2004 04:50
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it would be worth looking at the cams..i don't know much about the 1JZ (other than they are very tough!)..but a trick that us small capacity 4 bangers do..open up the cam timing..the less over lap the better..and if you can the exhaust cam can be redone with a bit more duration on the exhaust..that will bring her on boost quicker..
just a thought..
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Location:
Sydney
Registered:
May 2002
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Re: can a 1J spin up a T77 with a 1.32 back?
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Tue, 21 September 2004 05:19
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ccol...i'll give it a try one day 
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Location:
Brisbane
Registered:
May 2002
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Re: can a 1J spin up a T77 with a 1.32 back?
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Tue, 21 September 2004 06:16
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Anything is possible with a big enough hit of gas. 
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Location:
brisvegas
Registered:
August 2004
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Location:
Sydney
Registered:
May 2002
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Re: can a 1J spin up a T77 with a 1.32 back?
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Tue, 21 September 2004 07:42
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would that explain the weird spool up time when i back the timing off seems to come on to boost really quick sometimes especially when i increase the fuel!!!
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I supported Toymods
Location:
Adelaide
Registered:
July 2004
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Re: can a 1J spin up a T77 with a 1.32 back?
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Tue, 21 September 2004 07:58
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| drift86levin wrote on Tue, 21 September 2004 14:20 |
it would be worth looking at the cams..i don't know much about the 1JZ (other than they are very tough!)..but a trick that us small capacity 4 bangers do..open up the cam timing..the less over lap the better..and if you can the exhaust cam can be redone with a bit more duration on the exhaust..that will bring her on boost quicker..
just a thought..
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would this work on my 1GGTE? cos the lag is not what you would call errr light.... 
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Location:
Sydney
Registered:
May 2002
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Re: can a 1J spin up a T77 with a 1.32 back?
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Tue, 21 September 2004 08:10
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if you have stock turbos....sell your boost controller to some one and buy a HyperBoost one that celicamad builds they work great get rid of lag by holding your wastegates shut... they work well!!!
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I supported Toymods
Location:
Adelaide
Registered:
July 2004
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Re: can a 1J spin up a T77 with a 1.32 back?
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Tue, 21 September 2004 08:26
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Would it be a direct swap with my Bleed Valve, i.e. could I pull the hoses off the bleed valve and insert the hyperboost one? 
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Location:
Sydney
Registered:
May 2002
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Re: can a 1J spin up a T77 with a 1.32 back?
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Tue, 21 September 2004 09:42
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yep thats it...10mis and your off!!!!
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Location:
brisvegas
Registered:
August 2004
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Re: can a 1J spin up a T77 with a 1.32 back?
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Tue, 21 September 2004 09:47
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MR 1GGTE wrote on Tue, 21 September 2004 17:58
just a thought..[/quote |
would this work on my 1GGTE? cos the lag is not what you would call errr light....
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yeh mate sure could..if everything else is tops..get some adjustable cam gears would be the way..and try and minimise the overlap..overlap is the time that both the inlet valves and the exhaust are open (from memory the 1JZGTE has about 5deg of over lap) so thats a brif amount of time where boosted air goes in and straight out the exhaust!
but say 5deg more duration..and less overlap..makes a huge difference..
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I supported Toymods
Location:
Adelaide
Registered:
July 2004
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Re: can a 1J spin up a T77 with a 1.32 back?
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Tue, 21 September 2004 10:09
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| drift86levin wrote on Tue, 21 September 2004 19:17 |
MR 1GGTE wrote on Tue, 21 September 2004 17:58
just a thought..[/quote |
would this work on my 1GGTE? cos the lag is not what you would call errr light....
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yeh mate sure could..if everything else is tops..get some adjustable cam gears would be the way..and try and minimise the overlap..overlap is the time that both the inlet valves and the exhaust are open (from memory the 1JZGTE has about 5deg of over lap) so thats a brif amount of time where boosted air goes in and straight out the exhaust!
but say 5deg more duration..and less overlap..makes a huge difference..
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Adjustable cam gears....right....bit hard to find them...is there any other way to do it without the adjustables???
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Location:
brisvegas
Registered:
August 2004
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Re: can a 1J spin up a T77 with a 1.32 back?
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Tue, 21 September 2004 10:41
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short answer.. no with a but
long answer.. yes with an if
make it an adjustable one.. you just need 2 of the same 1G pullies.. i machine shop/engeneering shop would do it..
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Location:
in the shadows
Registered:
April 2004
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Re: can a 1J spin up a T77 with a 1.32 back?
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Tue, 21 September 2004 10:48
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if your 1j had a stroked capacity of around 4 litres (i.e maybe grafting a 1j head onto something resembling a landcruiser engine),a 1.32 would work ok. with VERY clever exhaust manifold designing it just may work with the limited exhaust pulse pressure available on the 1j. But, who wants to be the one to spend the money and try????
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Toymods Vice President
Location:
Sydney
Registered:
May 2002
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Re: can a 1J spin up a T77 with a 1.32 back?
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Tue, 21 September 2004 22:32
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| mx83toy wrote on Tue, 21 September 2004 17:42 |
would that explain the weird spool up time when i back the timing off seems to come on to boost really quick sometimes especially when i increase the fuel!!!
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This is because when you retard the timing you are igniting the mixture closer to the exhaust port opening. Therefore you are pumping out a still burning mix into the exhaust manifold and turbos. This is basically how antilag systems work.
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I supported Toymods
Location:
Adelaide
Registered:
July 2004
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Re: can a 1J spin up a T77 with a 1.32 back?
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Wed, 22 September 2004 03:03
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| drift86levin wrote on Tue, 21 September 2004 20:11 |
short answer.. no with a but
long answer.. yes with an if
make it an adjustable one.. you just need 2 of the same 1G pullies.. i machine shop/engeneering shop would do it..
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That is good to know, as I am probably gonna have a few spare motors on saturday  cheers for the help
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Registered:
March 2004
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Re: can a 1J spin up a T77 with a 1.32 back?
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Wed, 22 September 2004 08:16
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I know that a 1J with a gt30 (.82 rear housing) starts to boost around 4000rpm and feels laggy on the road. Cant imagine 1.32 being any better?
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Location:
Sydney
Registered:
May 2002
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Re: can a 1J spin up a T77 with a 1.32 back?
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Thu, 23 September 2004 10:20
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 yeah but when she comes out to play!  ->  -> . byby GTR 
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